Antenna



FIG. 1 is a front elevation view of an antenna, showing my design.

FIG. 2 is a right side elevation view thereof, the left side being a mirror image thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is an exploded enlarged right side elevation view thereof. 

The ornamental design for an antenna, as shown and described. 